Has anyone played both? Interested in opinions. What are fair values for used in good condition.
Thanks for an excellent analysis. Now, what are the approximate fair market values? I have an opportunity on both an SX90 and Couf II SopranoI play on both an SX90(R) and on a Keilwerth Toneking IV (which is the horn that the Superba II was stenciled from).
In my opinion, both sound and respond very similarly; the main differences are ergonomic.
The one significant sound difference that I noticed is that the alt f#, whose tonehole is smaller and higher-placed on the Toneking/Superba II than on the SX90, sounds different between the two horns. In particular, it sounds quite a bit better (i.e., matching the neighboring notes in timbre) on the SX90.
I made a post detailing the structural and ergonomic differences here.
The most noticeable of these are that:
1. The LH palm keys are not adjustable on the Superba II
2. The LH spatula does not tilt on the Superba II
3. The Superba II is missing the G# lifter mechanism
4. The bell-to-body brace of the Superba II is less substantial